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Dictionary of Nutrition Terms Antioxidant Chemical substances that help protect against call damage from free radicals. These include vitamins A, C, E, carotenoids and flavonoids. B Complex Vitamins Protects against blood clots and hardening of the arteries. Body Mass Index (BMI) A standardized ratio of weight to height and is often used as a general indication of health. Calcium It is one of the most abundant essential minerals in the human body. It helps form bones and teeth and is required for blood clotting, transmitting signals to nerve cells and muscle contraction. It helps prevent osteoporosis. Calorie This is a unit of measurement for energy. The amount of energy required to raise one cubic centimeter of water by one degree centigrade. Carotenoids This is a natural fat soluble pigment found in certain plants. It provides the bright red, orange, or yellow coloration of many vegetables. Cholesterol It is a soft, waxy substance present in all parts of the body, including the nervous system, skin, muscles, liver, intestines and heart. It is both made by the body and obtained by the body from animal products in the diet. It is manufactured in the liver for normal body functions including the production of hormones, bile, acid and vitamin D. It is transported in the blood to be used by all parts of the body. Dietary Fiber This comes from the thick call walls of plants. It is divided into two categories; water-soluble and water insoluble. Water soluble fiber lowers cholesterol and blood sugar levels. Some doctors believe that increasing fiber decreases the body’s need for insulin. Water insoluble fiber acts as a stool softener, which speeds digestion through the intestinal tract. Ellagic Acid A natural phenol antioxidant found in numerous fruits and vegetables that has been found to directly inhibit the DNA binding of certain carcinogens. Enzyme This is a complex protein that assists in or enables chemical reaction to occur. Fatty Acids Flavonoids These are individual isomers of fats. This is a class of water soluble pigments that are found in many plants. They serve as antioxidants. Free Radicals These are molecules that are highly reactive and can produce damage to cells and tissues in the body. Glycemic Index A dietary index that is used to rank carbohydrate based foods. It predicts the rate at which ingested food will increase blood sugar levels. Insulin A hormone that is secreted by the pancreas to help regulate blood sugar levels and promotes glycogen storage. Magnesium, Potassium and Calcium pressure. All three help lower blood Omega 3 Fatty Acids Fatty acids and alpha linolenic fatty acids help boost the immune system, reduce blood clots, protect against heart attacks, protects the arteries from plaque build-up and lower blood pressure. Phytochemicals Chemical compounds, such as beta-carotene, that occur naturally in plants and have a beneficial effect on human health. Phytoestrogens Substances like flaxseed lowers the risk of blood clots, strokes and cardiac arrhythmias. They also lower the LDL or “bad” cholesterol, triglycerides and blood pressure. Phytosterols These are plant sterols that resemble cholesterol, but actually reduce blood cholesterol. All nuts, seeds and wheat germ have this. Polyphenols Protects blood vessels, lowers blood pressure and reduces “bad” cholesterol. Potassium An essential mineral that helps regulate heart function, blood pressure and nerve and muscle activity. Protein One of the basic components of food that makes all life possible. Amino acids are building blocks of proteins. They transport nutrients, oxygen and waste throughout the body. They provide structure and contracting ability of muscles. They provide collagen to connective tissues of the skin, hair and nails. Saturated Fat A fat or fatty acid in which there are no double bonds between the carbon atoms of the fatty acid chain. It is usually solid at room temperature. Common saturated fats are butter, lard, palm oil, coconut oil, cottonseed oil, cream, cheese and meat. Sodium It is an essential nutrient and mineral. It maintains blood volume, regulate the balance of water in the cells and keeps nerves functioning. Unsaturated Fat A fat or fatty acid in which there are one or more double bonds between carbon atoms of the fatty acid chain. Common unsaturated and polyunsaturated fats are peanut butter, olives, nuts, seeds, fish, olive oil, sesame oil, peanut oil, and canola oil. Vitamin A (Retinol) A fat soluble vitamin that helps cells during cell reproduction, nourishing cells in eye structure and is required for transduction of light into nerve signals in the retina. It is required during pregnancy, stimulating growth of the fetus by influencing genes that determine growth of organs. Vitamin B1 (Thiamin) This is a water soluble vitamin that the body requires to break down carbohydrates, fats and protein. VitaminB2 (Riboflavin) This is a water soluble vitamin that helps the body process amino acids and fats. It can also help as an antioxidant. Vitamin B3 (Niacin) Niacin is required for cell respiration and helps release the energy in carbohydrates, fats and proteins. It supports proper circulation, healthy skin, functioning of the nervous system and normal secretion of bile and stomach fluids. Vitamin B9 (Folate) Also known as folic acid, Folate is necessary for cell replication and growth, it helps form the building blocks of DNA. Vitamin C This vitamin acts as an antioxidant protecting LDL cholesterol from oxidative damage. It protects smokers from the harmful effects of free radicals. It is needed for collagen. Vitamin D This vitamin maintains levels of calcium in the body. It is also produced by the body during exposure to ultraviolet rays of the sun. Vitamin E This vitamin protects cell membranes from damage. It may also help in the prevention and treatment of diabetes. Vitamin K This vitamin is necessary for proper bone growth and blood coagulation. It does this by helping the body transport calcium. Zinc This vitamin helps to repair wounds, maintain fertility in adults and helps to shorten colds.